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POWER SYSTEMS

Power Systems
Consider a long, two wire line composed of solid round conductors. The radius of both conductors is 0.25 cm and distance between their centers is 100 cm. If this distance is doubled, then the inductance per unit length.

 Halves.
  Increase but does not doubled.
 Doubled.
 Decrease but does not halves.

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Power Systems
A synchronous generator is of 100 MVA have inertia constant of 20 MJ/MVA. Find the angular momentum in MJsec/electrical degrees

 0.22
 2000
 5
 0.4

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Power Systems
Which of the following statement is/are true regarding infinite line?

 both 2 and 3
 It maintains the constant voltage
 It has infinite voltage
 It has infinite length

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Power Systems
Equal area criteria is used for

 absolute stability of the system
 nether 1 nor 2
 relative stability of the system
 either 1 or 2

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Power Systems
Which of the following is/are the methods of improving transient stability?

All of these
 Dynamic breaking
 Fast acting excitation control
 Fast acting governing system

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